Cylinder paper-making machine



W. S. CRANDELL.- CYLINDER PAPER MAKING MACHINE.

APPLICATION FILED JUNE 16. 1919.

Patented July 11, 1922..

4 SHEETS-SHEET I.

ATTORNEYS W. s. CRANDELL. CYLINDER PAPER MAKING MACHINE. AfPLlCATlON FILED JUNE 16, 1919. 1,422,541 a Patented J uly 11, 1922.

4 SHEETS-SHEET 2.

ATTORNEYx W. S. CRANDELL.

CYLINDER PAPER MAKING MACHINE. APPLICATION FILED JUNE 16, I919.

3; j ggfigl Q Patented July 11!, 1922.

4 SHEETSSHEET 3.

W. S. CRANDELL.

CYLINDER PAPER MAKING MACHINE.

APPLICATION FILED JUNE 16, 1919.

4 SHEETS SHEET 4.

Patented J uly 11, 1922.

ATTORNEY k UNHTEED STATES I earanr caries.

WILLIS S. CRANDELL, OF ELSMERE, NEW YORK, ASSIGNOR TO A. P. W. PAPER 00., OF 'LIBANY, NEW YORK, A CORPORATION OF NItlliN YORK.

CYLINDER PAPER-MAKING MACHINE.

Application filed .Tune 16, 1919.

T 0 all whom it may concern-.-

Be it known that I, WILLIS S. CRANDELL, a citizen of the United States, residing at Elsmere, in the county of Albany and State of New York, have invented certain new and useful Improvements in Cylinder Paper- Making Machines, of which the following is a specification. 7

The object of my invention has been to provide improvements in paper-making machines, which shall have, among other advantages, that of enabling a cylinder machine to be run at a higher speed than heretofore and of enabling the fibers of paper to be matted or crossed more rapidly than has heretofore been done in Fourdrinier paper-making machines and of enabling the same effect to be produced on a cylinder type machine, and to such ends my invention consists in improvements in paper-making machines and particularly cylinder machines hereinafter specified.

My invention is capable of embodiment in many different forms, and while I shall illustrate it by the best embodiment thereof known to me, such embodiment is only one of many possible embodiments and is therefore to be regarded only as typical, and my invention is not to be confined thereto.

In the accompanying drawings, Fig. 1 is a side elevation of a cylinder machine embodying my invention. Fig. 1 is a fragmentary perspective view of braces and retaining rings. Fig. 2 is a plan view of Fig. 1. Fig. 3 is an enlarged end view, partly in section, of the couch roll and cylinder mould of Fig. 1. Fig. 4 is an enlarged partial sectional view, taken on the line 4 4 of Fig. 2. Fig. 5 is an enlarged view of one end of the cylinder mould in elevation, with the upper portion partially cut away to show the con struction of the frame-work of the cylinder mould, and with the adjacent walls 10 of the vat and of the suction pipe 12 in section corresponding to the dotted section line 5 on Fig. 3. Fig. 6 is an enlarged detailed view of the agitator.

The two principal types of paper-making machines are the following:

First, the Fourdrinier machine, in which water carrying fibres for making paper is caused to flow over a horizontal stretch of an endless wire web or belt. This belt is usually shifted bodily transversely to the direction of the flow of the water, so as to Specification of Letters Patent.

Patented July ii, 1922.

Serial No. 304,455.

cross or mat or interweave the fibres and make paper which is strong both lengthwise and crosswise.

Second, the cylinder machine, in which the wire cloth upon which the water deposits 1ts paper-making fibres to form the web of paper is supported upon the periphery of a cylinder.

lVhile certain features of my invention are capable of application to both types of machines, other features are especially adapted for the cylinder type, and I have therefore chosen a machine of that type with which to illustrate my invention.

The cylinder moulds of cylinder machines have heretofore consisted of spiders, supporting parts which carry the wire periphcry. The end of the cylinder mould is connected with an opening in the wall of the vat containing the water, so that the water may flow out of the end or ends to lower the hydraulic head within the mould and permit the water to flow in from the outside of the cylinder and deposit the fibre on its periphery. Cylinder moulds thus constructed operate satisfactorily at ordinary speeds; but at very high speeds, such as I desire to use, water is carried around by the cylinder and flows with the web as it leaves the cylinder mould and travels upward with the couch roll. The water then flows back from the base of the couch roll, frequently wetting and breaking the sheet of paper or washing it down in streaks. This action of the water has heretofore limited the speed of cylinder moulds.

It is one of the objects of my invention to prevent such action of the water and permit paperto be formed at a much higher speed.

I have conceived that the spiders or wheels, which in the ordinary cylinder moulds support the parts carrying the wire cloth, cause the water to travel around and upward with the cylinder mould at hi h speeds, and that this water is largely the cause of the breakage of the sheet just described; and the features of my invention to be first described are for the purpose of overcoming this defect.

In the accompanying drawings, the cylinder mould 1 is supported in a vat or tank2, the latter containing water carrying the fibres from. whichthepaper is to be made. My cylinder mould is formed without spiders, spokes or similar devices, or at least with less of such devices than have heretofore been used. I construct my cylinder of rings 3 having longitudinal braces 4 halved into the rings, and a strand of wire is wound spirally on the rods or braces, a wire netting 5being supported on the spirally wound wire, the wire netting being for the purpose of intercepting the fibres as the Water flows through the netting. At its ends the cylinder has broad rings 6, which rest upon and are supported by rollers. There area series of lower rollers 7, T 7* and 7 upon which the outside of the rings are supported from below, and I have also shown rollers 8 within the cylinder supporting the under side of the rings 6 against the weight of the couch roll 9. The. walls 10 of the vat are provided with openings 11, through which water may flow from within the cylinder moulds into a suction pipe 12, connect ed. with a rotary pump, for the purpose of exhausting water from the cylinder moulds, and the openings 11 are surrounded by a ring 13, against which the end of the cylinder mould abuts, a flexible ring 14 being provided, as of felt, the said ring being mounted on the ring 13 and overlying the joint between the end of the cylinder and the said ring to make a substantially water tight connection. Within the vat, a. dam 15 extends from side wall to side wall of the vat, an apron 16 extending from the dam to the bottom of the vat. A cylindrical bottom 19 extends from the dam around the cylinder mould, so as to form a gradually contracting passage to carry the water around the cylinder until it shall have passed into the interior of-the latter.

I preferably provide a suction box 20, extending longitudinally of the cylinder mould and adjusted to the width and position whereit is most desired to cause the fibre to be deposited from the water by the exhaustion of the water from the said box.

The couch roll 9 is preferably so mounted as to be free to rise and fall with any irregularities in the surface of the cylinder mould, and for this purpose is shown as mounted in bearing-son the outer ends of arms 21. The

couch roll is driven by an apron 26 which runs around the couch roll, and between it and the cylinder mould, being guided over various rollers which it is not necessary to explain. The fibres are deposited on the periphery of the couch roll, as before described, and are picked up from the latter by the apron 26 and carried upward over the couch roll, as indicated by the arrows.

I not only preferably make the cylinder mould without spiders, spokes or other form of radially extending devices, so as to prevent water being carried around by the cylinder at high speeds, but I also preferably provide a suction box 24, so placed as to draw away any water which may be carried up and prevent its reaching the couch roll and going with the web of paper and then running back over or otherwise softening or interfering with the web of paper. More or fewer suction boxes than the boxes 20 and 24 can be used, if desired, and their location and dimensions may vary.

The suction boxes 20 and 24 are supported within the cylinder and with their, open sides in contact with the inner edges of the ribs 3 and 4, by brackets 20 (only one of which is shown, Fig. 5) extending from the closed ends of the boxes to the walls 10 of the vat where the brackets are secured. Pipes 24* form out-lets from these suction boxes and extend through the walls of the larger suction pipes 12 leading from the cylinder, as shown in Fig. 5. These pipes 24 are connected to a pump or other suction means separate from the rotary pumps shown as producing the suction in the general interior of the cylinder. The suction boxes while separated from the interior peripheral surface of the screen itself because of the intervening rib construction, are sufficiently close thereto and the suction boxes are of so restricted a volume as compared to the entire interior of the cylinder and the reduced pressure therein of sufficient extent to produce a suction effect upon the adjacentrestricted area of the screen appreciable over the suction effect produced by the reduced pressure in the general interior of the screen.

In order to enable fibres of paper to be crossed or matted, as in the Fourdrinier machine, butpreferably without the complexity and labor of shifting the wire netting transversely to the flow of water, I have conceived the idea of shifting the water transversely to the wire netting, and particularly of doing this in a cylinder mould machine.

In the construction which I have chosen to illustrate this feature of-my invention, a frame is formed consisting of rods 27,which are supported by yokes 28 at each end, each yoke being supported by bars. The left-- hand yoke, as seen in Fig. 4, being supported by a. squared bar 29 'sli-din throughout a squared bearing 30, and the right-hand yoke being supported by a rod 31, which is reciprocated by a connecting rod 32 that is connected with a crank pin 33, which is secured in one of the series of holes in a crank disk 34, so that the throw of the connecting rod can be varied. The rods 27 have vanes 35 mounted upon them, the vanes being preferably spaced apart by sleeves 36 mounted on the rods between the vanes.

The vanes are mounted in the contracted passage between the dam and the cylinder mould, and the water fiowing through' the said passage and into the cylinder mould is given a movement transverse to its direction of flow by the action of the vanes as they are reciprocated; thus the fibres are crossed over each other or matted in substantially the same way as by the reciprocation of the web of a Fourdrinier machine, and paper is produced which has strength crosswise as well as lengthwise of the web. At the same. time, the cylinder machine provided with my improvements has the advantages of a. cylinder machine over the Fourdrinier machine in the saving of expense in the wire Webs and aprons and in the power required to drive the machine.

'Io briefly restate the mode of operation: The water passing over the dam flows into the contracted passage between the cylinder mould and the cylindrical bottom and passes into the cylinder mould, the water which previously passed into the cylinder mould having been exhausted therefrom by the pump. The deposition of the fibres on the part of the periphery of the cylinder mould where the action is most desired is hastened and increased by the effect of the suction box 20.

The carrying of the water up around inside the cylinder mould when the latter is run at high speeds is largely avoided by the construction which does not require spiders or other'forms of spokes orradial members, and such water as is. carried up is drawn away by the suction box 24, so as not to pass with the web of paper. up the face of the couch roll and break the paper. The water, as it travels over the face of the cylinder mould, is moved back and forth across the direction of motion of the said face by the reciprocation of the vanes,.and the matting of the fibres is effected as before described.

I claim:

1. In a cylinder paper machine, the combination of a cylinder mould, rollers supporting the outside of the periphery, and rollers supporting the inside of the periphery.

2. In a. cylinder paper machine, the combination of a cylinder mould, rollers supporting the outside of the periphery and diametrically oppositely disposed rollers supporting the inside of the periphery.

3. In a cylinder paper machine, the combination of a vat for the fiber-bearing liquid, a cylinder mould having an unobstructed interior partly submerged and rotating therein, and a suction box on the inside of said mould wholly below the level of the fiberbearing liquid adjacent the points of first contact of said liquid with the periphery of said mould.

4. In a cylinder paper machine, the combination of a vat for the fiber-bearing liquid, a cylinder mould substantially without interior radial parts, partly submerged and rotating in said liquid, a transfer apron above said liquid level and a suction box above and between said liquid level and said transfer apron engaging the peripheral surface of said cylinder mould.

5. In a cylinder paper machine, the combination of a vat for the fiber-bearing liquid, a cylinder mould partly submerged and rotating therein, a suction box engaging the inside of the periphery of said cylinder below the liquid level and a suction box engaging the periphery of said cylinder above said liquid level.

6. In a cylinder paper machine, means providing a constantly flowing stream of fiber-bearing liquid, a cylinder mould partly submerged and rotating therein, a suction box engaging the inside of the periphery of said cylinder below the liquid level on the advancing stream side and a suction box engaging the periphery of said cylinder above said liquid level on the side of said cylinder diametrically opposite to said first suction box.

7. In a cylinder paper machine, the combination of a vat for the fiber-bearing liquid, a cylinder mould partly submerged and rotating therein, a suction box below said liquid level engaging the inside of the periphery of said cylinder on the side thereof advancing into said liquid and a suction box above said liquid level and engaging the periphery of said cylinder on the side retreating from said liquid.

8. In a cylinder paper machine, the combination of a vat for the fiber-bearing liquid, a cylinder mould having an unobstructed interior partly submerged and rotating therein, a couch roll and suction box above said liquid level, said suction box engaging the inside of the periphery of the cylinder mould at a point in advance of the couch roll.

9. In a cylinder paper machine the combination of a cylinder mould having an unobstructed interior, a cduch roll, a suction box engaging the inside of the periphery of the mould at a point in advance of the couch roll, and a suction box engaging the inside of the periphery of the cylinder mould at the point of deposit of the paper on the periphery.

10. In a paper-making machine, the combination of a traveling web for receiving the deposit of fibers, means for causing a fiberbearing liquid to flow in a restricted path through said web, means for imparting to the liquid on the advance side of its path to and immediately adjacent said web a motion transverse to the direction of motion of said web and suction means on the opposite side of said web in the path of said liquid.

11. In a paper-making machine, the combination of atravelling web for receiving the deposit of fibers, means for causing a stream of fiber-bearing liquid to flow through said web, means to maintain said stream at a predetermined level insufiicient to completely submerge said web, means for imparting to said liquid on the advance side of the stream immediately adjacent said Web and immediately below said predetermined level a motion transverse to the direction of motion of said web and a suction box on the retreating side of said stream and directly opposite said motion imparting means.

12. In a paper-making machine, the combination of a vat for the fiber-bearing liquid, a cylinder mould partly submerged and rotating therein, means adjacent the periphery of said cylinder on the side advancing into said liquid and immediately below the level of said liquid for imparting to said liquid a motion transverse to the direction of peripheral movement of said cylinder and suction means in the interior of said cylinder.

13. In a paper-making machine the combination of a cylinder mould. a dam, a cylindrical bottom forming a contracted passage around said cylinder mould, vanes mounted in said passage in the direction of motion of said cylinder mould, and means for moving said vanes transversely to said direction of motion.

' 14. In a paper-making machine, the combination of a rotatably mounted foraminous cylinder mould, a restricted passage for a fiber-bearing liquid embracing the lower cylindrical periphery of the mould and means producing a reduced pressure Within the lower portion of said cylindrical mould.

In testimony that I claim the foregoing, I have hereunto set my hand this 13th day of June, 1919.

WILLIS S. CRANDELL. 

